"Too many output arguments" error while working with the fmincon solver inside the optimization tool.

Explenation after the code.

% Set nondefault solver options
options2 = optimoptions('fmincon','PlotFcn','optimplotfvalconstr');

% Solve
[solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],...
    @objectiveFcn,options2);

% Clear variables
clearvars options2

These are at default.

function f = objectiveFcn(optimInput)

x = optimInput(1:8124);
y = optimInput(8125:end);
f = -sum(1./(1+exp(-x))*1./(1+exp(-y')),'all');
end

function [c,ceq] = constraintFcn(optimInput)

x = optimInput(1:8124);
y = optimInput(8125:end);
c = sum(1./(1+exp(-x))*1./(1+exp(-y')).*(1.-aa),'all') - 0.1;
ceq = [];
end

vector w is passed for optimInput which is a 8243*1 vector. aa variable inside the constraint is a 8124*119 matrix. I am getting the error too many output arguments. How should I model something like this?

[Jan]

Please post the complete error message, not just a part of it. Then the reades can see, where the problem occurs. We cannot run your code because w is missing.

[Yagiz Dereboy]

Oh ok thanks for the heads up. But may I ask how could I have shared a variable?

Answer 1

[Jan]

A bold guess:

[solution,objectiveValue] = fmincon(@objectiveFcn,w,[],[],[],[],[],[],...
    @objectiveFcn,options2);
%   ^^^^^^^^^^^^^ This should be "constraintFcn" ?!